Jeff is flipping a coin,what is the probability that he will

还可以飞2022-10-04 11:39:541条回答

Jeff is flipping a coin,what is the probability that he will throw heads on each of the tow flips

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排列组合 Flipping a fair coin 排列组合 Flipping a fair coin Flipping a fair coin.Assume that the coin is flipped 7 times. What is the probability that both heads and tails occur? Thank you~ moneytang1年前1: 白领先生共回答了17个问题 | 采纳率94.1%

翻转硬币.假设硬币被翻转的7倍,什么是概率,头和尾巴的发生?p=1-（2的7次方分之）-（2的7次方分之1）=126/128=63/64

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Women aren't anything but flipping pains in the bottom. Women aren't anything but flipping pains in the bottom. 好像是句流行语还是什么的 不要只翻译字面意思哦 asdgkjhawgsrthdf1年前3: 一个人一支烟共回答了17个问题 | 采纳率94.1%

意思是：女人只会把痛苦深深地埋藏在心底.
因为女人多是情感动物,性格较为内向,又比较好面子,有了不开心,往往闷在心里,宣泄的渠道不多.

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向概率牛求教一道概率题Two players take turns flipping a fair coin.The g 向概率牛求教一道概率题 Two players take turns flipping a fair coin. The game ends when the same outcome occurs on three flips in a row. Whichever player fli pped the coin last,wins.For example: Player 1 flips H Player 2 flips T Player 1 flips T Player 2 flips H Player 1 flips H Player 2 flips H latticevector1年前1: 6b7j 共回答了24个问题 | 采纳率79.2%

Method 1:
first flip:no one can win
second flip:no one can win
third flip:first player win with probability 1/4 (HHH or TTT)
fouth flip:second player win with probablility (3/4)*(1/4)
fifth flip:first play win with probablity (3/4)^2 * (1/4)
sixth flip:second play win with probablity (3/4)^3 * (1/4)
(Notice 1/4+(3/4)*(1/4)+(3/4)^2 * (1/4)+...= (1/4)*(1/(1-3/4))= 1)
P(first play wins)=(1/4)+(3/4)^2 * (1/4)+...=(1/4)* (1+(3/4)^2+(3/4)^4...)=(1/4)(1/(1-9/16))=4/7
Method 2:
We know third flip:first player win with probability 1/4 (HHH or TTT)
So second player is just like first player except there is the 1/4 chance that first player wins first.
=> P(second player win)=3/4 P(first player win)
P(second player win)+ P(first player win) = 1
=>3/4 P(first player win)+P(first player win)=1
=>P(first player win)=4/7

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